这个国家同意为了共同的安全而与邻国结盟。 The country agreed to confederate with the neighboring country for mutual safety.
中立的不与 ... 结盟的、不支持的或不援助战争、争吵或竞争中的任一方的 Not aligned with, supporting, or favoring either side in a war, dispute, or contest.
在历史上，德国曾经与意大利结盟过。 Had ever allied with Italy in history.
协约国在第一次世界大战期间与欧洲同盟国对抗的结盟国家，有俄国、法国、英国，后来又有包括美国的其它很多国家， The nations allied against the Central Powers of Europe during World War I. They were Russia, France, Great Britain, and later many others, including the United States.
